A new differential protection algorithm for power reactors based on the second central moment

Vázquez, E.; Andrade, Manuel A.; Esponda, Héctor; Mendoza‐Avila, Jesús

doi:10.1016/j.ijepes.2019.105795

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…It is widely used in power systems for reactive power compensation and system voltage stabilization [1,2]. However, due to manufacturing defects, mechanical damage, material aging, and arc breakdown, the reactor is prone to frequent failures [3,4]. Among various common faults, inter-turn short-circuit faults (ISCFs) account for the largest proportion [5].…”

Section: Introductionmentioning

confidence: 99%

A Detection Method for Slight Inter-Turn Short-Circuit Fault in Dry-Type Air-Core Shunt Reactors

Wu,

Zhen,

Chang

et al. 2024

Energies

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Dry-type air-core shunt reactors are integral components in power transmission and distribution networks, designed to control reactive power and enhance system stability. However, inter-turn short-circuit faults (ISCFs) are common occurrences in shunt reactors, which are caused by various factors, including manufacturing defects, insulation degradation, or operational stresses. At the early stage of the ISCFs, the current does not reach a sufficient level to activate the protective equipment. These faults may lead to serious consequences, such as overheating, insulation breakdown, and even catastrophic failures, posing risks to the entire power system. Therefore, developing an effective and reliable detection method for ISCFs at the early stage is paramount. In this paper, a new method named the fault detection factor (FDF) based on equivalent resistance is presented to detect the slight ISCFs in dry-type air-core shunt reactors considering insulation resistance. In addition, the effect of noise signal existence in the monitoring process is taken into account. A moving average filter is adopted to guarantee both the sensitivity and the reliability of the proposed method. Ultimately, the simulation results of the FDF under different conditions are presented, which show the effectiveness and potential of the proposed method in observing and monitoring slight ISCFs.

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Section: Introductionmentioning

confidence: 99%

A Detection Method for Slight Inter-Turn Short-Circuit Fault in Dry-Type Air-Core Shunt Reactors

Wu,

Zhen,

Chang

et al. 2024

Energies

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“…Therefore, the shunt reactors need additional criteria for detecting turn-to-turn faults. Some solutions of the problem can be found in [9][10][11][12][13][14], they include:…”

Section: Introductionmentioning

confidence: 99%

“…-impedance relays, that may be used as primary or backup protection [10], -split phase protection schemes used only for shunt reactors with two parallel windings [10][11], -earth-fault overcurrent protection controlled by the directional zero-sequence element [9][10], -earth fault overcurrent protection supported by a directional negative-sequence relay [10], -Buchholz relays, used only for oil-immersed type of shunt reactor [9][10], -hybrid differential algorithms, where the difference between normalized negative-sequence terminal voltage and normalized-negative sequence reactor current phasors are taken into account [12], -an approach based on the relationship between flux and current of shunt reactor [13], -differential protection, where the magnitude of the second central moment (SCM) from the residual and differential current is calculated [14]. In this paper, three methods for detecting turn-to-turn faults based on zero-sequence reactance, negative-sequence reactance, and phase impedance are proposed.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Detection of Turn-to-Turn Faults in Shunt Reactors

Solak¹,

Mieske

Schneider

2022

IEEE Access

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In this paper, the analysis and simulation of shunt reactor turn-to-turn faults, as well as the algorithms for their detection, are presented. A simple equivalent circuit of a shunt reactor applicable for a small number of short-circuited turns was developed and applied to simulate such faults. It is shown why the commonly applied differential relays are not able to detect turn-to-turn faults. Then three new algorithms are introduced and their performance is analyzed for simulated internal faults. The proposed methods are based on zero-sequence reactance, negative-sequence reactance, and phase impedance. The sensitivity and security of the presented methods are discussed. The proposed algorithms' performance has been tested with the signals generated with the use of the MATLAB/Simulink program. The results confirm that the proposed algorithm can effectively improve the detection of turn-to-turn faults. The paper ends with recommendations for the setting of the proposed protection schemes.

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Existing Developments in Adaptive Smart Grid Protection: A Review

Khalid

Shobole²

2021

Electric Power Systems Research

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A new differential protection algorithm for power reactors based on the second central moment

Cited by 3 publications

References 10 publications

A Detection Method for Slight Inter-Turn Short-Circuit Fault in Dry-Type Air-Core Shunt Reactors

A Detection Method for Slight Inter-Turn Short-Circuit Fault in Dry-Type Air-Core Shunt Reactors

Modeling and Detection of Turn-to-Turn Faults in Shunt Reactors

Existing Developments in Adaptive Smart Grid Protection: A Review

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